If a woman lacks estrogen, she will have the following clinical symptoms: 1. Due to the lack of estrogen, the endometrium will be thin, so the menstrual flow will be reduced. 2, Due to the decrease of estrogen, it will make the libido decrease in the quality of sex life in the clinic, and it will not be easy to reach orgasm. This is the corresponding symptom of lack of estrogen in women clinically. In addition, if you enter menopause, ovarian function declines and estrogen levels drop, which can also cause hot flashes, excessive sweating, irritability and other symptoms that are unique to menopause.